BJ_web_developers / dyitoc

  function ruleSorter(s1, s2) {
    return s1[1] > s2[1] ? 1 : -1;
  }
  
  function tidyRuleDuplicates(rules) {
    var list = [];
    var repeated = [];
  
    for (var i = 0, l = rules.length; i < l; i++) {
      var rule = rules[i];
  
      if (repeated.indexOf(rule[1]) == -1) {
        repeated.push(rule[1]);
        list.push(rule);
      }
    }
  
    return list.sort(ruleSorter);
  }
  
  module.exports = tidyRuleDuplicates;